git.sesse.net Git - nageru/blob - mainwindow.cpp

   1 #include "mainwindow.h"
   2
   3 #include <math.h>
   4 #include <stdio.h>
   5 #include <algorithm>
   6 #include <string>
   7 #include <vector>
   8 #include <QBoxLayout>
   9 #include <QKeySequence>
  10 #include <QLabel>
  11 #include <QMetaType>
  12 #include <QPushButton>
  13 #include <QResizeEvent>
  14 #include <QShortcut>
  15 #include <QSize>
  16 #include <QString>
  17
  18 #include "glwidget.h"
  19 #include "lrameter.h"
  20 #include "mixer.h"
  21 #include "post_to_main_thread.h"
  22 #include "ui_display.h"
  23 #include "ui_mainwindow.h"
  24 #include "vumeter.h"
  25
  26 class QResizeEvent;
  27
  28 using namespace std;
  29 using namespace std::placeholders;
  30
  31 Q_DECLARE_METATYPE(std::vector<std::string>);
  32
  33 MainWindow *global_mainwindow = nullptr;
  34
  35 MainWindow::MainWindow()
  36         : ui(new Ui::MainWindow)
  37 {
  38         global_mainwindow = this;
  39         ui->setupUi(this);
  40
  41         ui->me_live->set_output(Mixer::OUTPUT_LIVE);
  42         ui->me_preview->set_output(Mixer::OUTPUT_PREVIEW);
  43
  44         // Hook up the transition buttons.
  45         // TODO: Make them dynamic.
  46         connect(ui->transition_btn1, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 0));
  47         connect(ui->transition_btn2, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 1));
  48         connect(ui->transition_btn3, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 2));
  49
  50         // Aiee...
  51         transition_btn1 = ui->transition_btn1;
  52         transition_btn2 = ui->transition_btn2;
  53         transition_btn3 = ui->transition_btn3;
  54         qRegisterMetaType<std::vector<std::string>>("std::vector<std::string>");
  55         connect(ui->me_preview, &GLWidget::transition_names_updated, this, &MainWindow::set_transition_names);
  56         qRegisterMetaType<Mixer::Output>("Mixer::Output");
  57 }
  58
  59 void MainWindow::resizeEvent(QResizeEvent* event)
  60 {
  61         QMainWindow::resizeEvent(event);
  62
  63         // Ask for a relayout, but only after the event loop is done doing relayout
  64         // on everything else.
  65         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
  66 }
  67
  68 void MainWindow::mixer_created(Mixer *mixer)
  69 {
  70         // Make the previews.
  71         unsigned num_previews = mixer->get_num_channels();
  72
  73         for (unsigned i = 0; i < num_previews; ++i) {
  74                 Mixer::Output output = Mixer::Output(Mixer::OUTPUT_INPUT0 + i);
  75
  76                 QWidget *preview = new QWidget(this);
  77                 Ui::Display *ui_display = new Ui::Display;
  78                 ui_display->setupUi(preview);
  79                 ui_display->label->setText(mixer->get_channel_name(output).c_str());
  80                 ui_display->display->set_output(output);
  81                 ui->preview_displays->insertWidget(previews.size(), preview, 1);
  82                 previews.push_back(ui_display);
  83
  84                 // Hook up the click.
  85                 connect(ui_display->display, &GLWidget::clicked, bind(&MainWindow::channel_clicked, this, i));
  86
  87                 // Let the theme update the text whenever the resolution changed.
  88                 connect(ui_display->display, &GLWidget::resolution_updated, this, &MainWindow::update_channel_name);
  89
  90                 // Hook up the keyboard key.
  91                 QShortcut *shortcut = new QShortcut(QKeySequence(Qt::Key_1 + i), this);
  92                 connect(shortcut, &QShortcut::activated, bind(&MainWindow::channel_clicked, this, i));
  93
  94                 // Hook up the white balance button (irrelevant if invisible).
  95                 ui_display->wb_button->setVisible(mixer->get_supports_set_wb(output));
  96                 connect(ui_display->wb_button, &QPushButton::clicked, bind(&MainWindow::wb_button_clicked, this, i));
  97         }
  98
  99         char buf[256];
 100         snprintf(buf, sizeof(buf), "%.1f dB", mixer->get_limiter_threshold_dbfs());
 101         ui->limiter_threshold_db_display->setText(buf);
 102         snprintf(buf, sizeof(buf), "%.1f dB", mixer->get_compressor_threshold_dbfs());
 103         ui->compressor_threshold_db_display->setText(buf);
 104
 105         connect(ui->locut_cutoff_knob, &QDial::valueChanged, this, &MainWindow::cutoff_knob_changed);
 106         cutoff_knob_changed(ui->locut_cutoff_knob->value());
 107
 108         connect(ui->limiter_threshold_knob, &QDial::valueChanged, this, &MainWindow::limiter_threshold_knob_changed);
 109         connect(ui->compressor_threshold_knob, &QDial::valueChanged, this, &MainWindow::compressor_threshold_knob_changed);
 110         connect(ui->limiter_enabled, &QCheckBox::stateChanged, [this](int state){
 111                 global_mixer->set_limiter_enabled(state == Qt::Checked);
 112         });
 113         connect(ui->compressor_enabled, &QCheckBox::stateChanged, [this](int state){
 114                 global_mixer->set_compressor_enabled(state == Qt::Checked);
 115         });
 116         connect(ui->reset_meters_button, &QPushButton::clicked, this, &MainWindow::reset_meters_button_clicked);
 117         mixer->set_audio_level_callback(bind(&MainWindow::audio_level_callback, this, _1, _2, _3, _4, _5, _6));
 118 }
 119
 120 void MainWindow::cutoff_knob_changed(int value)
 121 {
 122         float octaves = value * 0.1f;
 123         float cutoff_hz = 20.0 * pow(2.0, octaves);
 124         global_mixer->set_locut_cutoff(cutoff_hz);
 125
 126         char buf[256];
 127         snprintf(buf, sizeof(buf), "%ld Hz", lrintf(cutoff_hz));
 128         ui->locut_cutoff_display->setText(buf);
 129 }
 130
 131 void MainWindow::limiter_threshold_knob_changed(int value)
 132 {
 133         float threshold_dbfs = value * 0.1f;
 134         global_mixer->set_limiter_threshold_dbfs(threshold_dbfs);
 135
 136         char buf[256];
 137         snprintf(buf, sizeof(buf), "%.1f dB", threshold_dbfs);
 138         ui->limiter_threshold_db_display->setText(buf);
 139 }
 140
 141 void MainWindow::compressor_threshold_knob_changed(int value)
 142 {
 143         float threshold_dbfs = value * 0.1f;
 144         global_mixer->set_compressor_threshold_dbfs(threshold_dbfs);
 145
 146         char buf[256];
 147         snprintf(buf, sizeof(buf), "%.1f dB", threshold_dbfs);
 148         ui->compressor_threshold_db_display->setText(buf);
 149 }
 150
 151 void MainWindow::reset_meters_button_clicked()
 152 {
 153         global_mixer->reset_meters();
 154         ui->peak_display->setText("-inf");
 155         ui->peak_display->setStyleSheet("");
 156 }
 157
 158 void MainWindow::audio_level_callback(float level_lufs, float peak_db, float global_level_lufs, float range_low_lufs, float range_high_lufs, float auto_gain_staging_db)
 159 {
 160         timeval now;
 161         gettimeofday(&now, nullptr);
 162
 163         // The meters are somewhat inefficient to update. Only update them
 164         // every 100 ms or so (we get updates every 5–20 ms).
 165         double last_update_age = now.tv_sec - last_audio_level_callback.tv_sec +
 166                 1e-6 * (now.tv_usec - last_audio_level_callback.tv_usec);
 167         if (last_update_age < 0.100) {
 168                 return;
 169         }
 170         last_audio_level_callback = now;
 171
 172         post_to_main_thread([=]() {
 173                 ui->vu_meter->set_level(level_lufs);
 174                 ui->lra_meter->set_levels(global_level_lufs, range_low_lufs, range_high_lufs);
 175
 176                 char buf[256];
 177                 snprintf(buf, sizeof(buf), "%.1f", peak_db);
 178                 ui->peak_display->setText(buf);
 179                 if (peak_db > -0.1f) {  // -0.1 dBFS is EBU peak limit.
 180                         ui->peak_display->setStyleSheet("QLabel { background-color: red; color: white; }");
 181                 } else {
 182                         ui->peak_display->setStyleSheet("");
 183                 }
 184
 185                 ui->gainstaging_knob->setValue(lrintf(auto_gain_staging_db * 10.0f));
 186                 snprintf(buf, sizeof(buf), "%+.1f dB", auto_gain_staging_db);
 187                 ui->gainstaging_db_display->setText(buf);
 188         });
 189 }
 190
 191 void MainWindow::relayout()
 192 {
 193         int height = ui->vertical_layout->geometry().height();
 194
 195         double remaining_height = height;
 196
 197         // Allocate the height; the most important part is to keep the main displays
 198         // at 16:9 if at all possible.
 199         double me_width = ui->me_preview->width();
 200         double me_height = me_width * 9.0 / 16.0 + ui->label_preview->height() + ui->preview_vertical_layout->spacing();
 201
 202         // TODO: Scale the widths when we need to do this.
 203         if (me_height / double(height) > 0.8) {
 204                 me_height = height * 0.8;
 205         }
 206         remaining_height -= me_height + ui->vertical_layout->spacing();
 207
 208         double audiostrip_height = ui->audiostrip->geometry().height();
 209         remaining_height -= audiostrip_height + ui->vertical_layout->spacing();
 210
 211         // The previews will be constrained by the remaining height, and the width.
 212         double preview_label_height = previews[0]->title_bar->geometry().height() + ui->preview_displays->spacing();  // Wrong spacing?
 213         int preview_total_width = ui->preview_displays->geometry().width();
 214         double preview_height = std::min(remaining_height - preview_label_height, (preview_total_width / double(previews.size())) * 9.0 / 16.0);
 215         remaining_height -= preview_height + preview_label_height + ui->vertical_layout->spacing();
 216
 217         ui->vertical_layout->setStretch(0, lrintf(me_height));
 218         ui->vertical_layout->setStretch(1, 0);  // Don't stretch the audiostrip.
 219         ui->vertical_layout->setStretch(2, std::max<int>(1, remaining_height));  // Spacer.
 220         ui->vertical_layout->setStretch(3, lrintf(preview_height + preview_label_height));
 221
 222         // Set the widths for the previews.
 223         double preview_width = preview_height * 16.0 / 9.0;
 224         double remaining_preview_width = preview_total_width;
 225
 226         for (unsigned i = 0; i < previews.size(); ++i) {
 227                 ui->preview_displays->setStretch(i, lrintf(preview_width));
 228                 remaining_preview_width -= preview_width + ui->preview_displays->spacing();
 229         }
 230
 231         // The preview horizontal spacer.
 232         ui->preview_displays->setStretch(previews.size(), lrintf(remaining_preview_width));
 233 }
 234
 235 void MainWindow::set_transition_names(vector<string> transition_names)
 236 {
 237         if (transition_names.size() < 1) {
 238                 transition_btn1->setText(QString(""));
 239         } else {
 240                 transition_btn1->setText(QString::fromStdString(transition_names[0]));
 241         }
 242         if (transition_names.size() < 2) {
 243                 transition_btn2->setText(QString(""));
 244         } else {
 245                 transition_btn2->setText(QString::fromStdString(transition_names[1]));
 246         }
 247         if (transition_names.size() < 3) {
 248                 transition_btn3->setText(QString(""));
 249         } else {
 250                 transition_btn3->setText(QString::fromStdString(transition_names[2]));
 251         }
 252 }
 253
 254 void MainWindow::update_channel_name(Mixer::Output output)
 255 {
 256         if (output >= Mixer::OUTPUT_INPUT0) {
 257                 unsigned channel = output - Mixer::OUTPUT_INPUT0;
 258                 previews[channel]->label->setText(global_mixer->get_channel_name(output).c_str());
 259         }
 260 }
 261
 262 void MainWindow::transition_clicked(int transition_number)
 263 {
 264         global_mixer->transition_clicked(transition_number);
 265 }
 266
 267 void MainWindow::channel_clicked(int channel_number)
 268 {
 269         if (current_wb_pick_display == channel_number) {
 270                 // The picking was already done from eventFilter(), since we don't get
 271                 // the mouse pointer here.
 272         } else {
 273                 global_mixer->channel_clicked(channel_number);
 274         }
 275 }
 276
 277 void MainWindow::wb_button_clicked(int channel_number)
 278 {
 279         current_wb_pick_display = channel_number;
 280         QApplication::setOverrideCursor(Qt::CrossCursor);
 281 }
 282
 283 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
 284 {
 285         if (current_wb_pick_display != -1 &&
 286             event->type() == QEvent::MouseButtonRelease &&
 287             watched->isWidgetType()) {
 288                 QApplication::restoreOverrideCursor();
 289                 if (watched == previews[current_wb_pick_display]->display) {
 290                         const QMouseEvent *mouse_event = (QMouseEvent *)event;
 291                         set_white_balance(current_wb_pick_display, mouse_event->x(), mouse_event->y());
 292                 } else {
 293                         // The user clicked on something else, give up.
 294                         // (The click goes through, which might not be ideal, but, yes.)
 295                         current_wb_pick_display = -1;
 296                 }
 297         }
 298         return false;
 299 }
 300
 301 namespace {
 302
 303 double srgb_to_linear(double x)
 304 {
 305         if (x < 0.04045) {
 306                 return x / 12.92;
 307         } else {
 308                 return pow((x + 0.055) / 1.055, 2.4);
 309         }
 310 }
 311
 312 }  // namespace
 313
 314 void MainWindow::set_white_balance(int channel_number, int x, int y)
 315 {
 316         // Set the white balance to neutral for the grab. It's probably going to
 317         // flicker a bit, but hopefully this display is not live anyway.
 318         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, 0.5, 0.5, 0.5);
 319         previews[channel_number]->display->updateGL();
 320         QRgb reference_color = previews[channel_number]->display->grabFrameBuffer().pixel(x, y);
 321
 322         double r = srgb_to_linear(qRed(reference_color) / 255.0);
 323         double g = srgb_to_linear(qGreen(reference_color) / 255.0);
 324         double b = srgb_to_linear(qBlue(reference_color) / 255.0);
 325         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, r, g, b);
 326         previews[channel_number]->display->updateGL();
 327 }